feat: the entire mod

.editorconfig

@@ -0,0 +1,3 @@
+[*.json]
+indent_style = space
+indent_size = 4

.gitattributes

@@ -0,0 +1,2 @@
+# Auto detect text files and perform LF normalization
+* text=auto

.gitignore

@@ -0,0 +1,33 @@
+# eclipse
+eclipse
+bin
+*.launch
+.settings
+.metadata
+.classpath
+.project
+
+# idea
+out
+classes
+*.ipr
+*.iws
+*.iml
+/.idea/*
+!/.idea/gradle.xml
+
+# netbeans
+.nb-gradle
+.nb-gradle-properties
+
+# vs code
+.vscode
+
+# gradle
+build
+.gradle
+
+# other
+run
+.DS_Store
+Thumbs.db

.idea/gradle.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="delegatedBuild" value="true" />
+        <option name="testRunner" value="GRADLE" />
+        <option name="distributionType" value="DEFAULT_WRAPPED" />
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/versions/1.18.2-fabric" />
+            <option value="$PROJECT_DIR$/versions/1.18.2-forge" />
+            <option value="$PROJECT_DIR$/versions/1.19.4-fabric" />
+            <option value="$PROJECT_DIR$/versions/1.19.4-forge" />
+          </set>
+        </option>
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>

LICENSE

@@ -0,0 +1,23 @@
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.

build.gradle.kts

@@ -0,0 +1,25 @@
+plugins {
+    id("xyz.deftu.gradle.multiversion-root")
+}
+
+preprocess {
+    val fabric11904 = createNode("1.19.4-fabric", 11903, "yarn")
+    val fabric11802 = createNode("1.18.2-fabric", 11802, "yarn")
+    val forge11904 = createNode("1.19.4-forge", 11903, "yarn")
+    val forge11802 = createNode("1.18.2-forge", 11802, "yarn")
+
+    fabric11904.link(forge11904)
+    forge11904.link(forge11802)
+    forge11802.link(fabric11802)
+}
+
+val releaseAllVersions by tasks.registering {
+    listOf(
+        "1.18.2-fabric",
+        "1.19.4-fabric",
+        "1.18.2-forge",
+        "1.19.4-forge"
+    ).forEach { version ->
+        dependsOn(":$version:releaseProject")
+    }
+}

gradle.properties

@@ -0,0 +1,7 @@
+kotlin.code.style=official
+org.gradle.jvmargs=-Xmx2G
+
+mod.name=e4mc
+mod.id=e4mc_minecraft
+mod.version=2.0.0
+mod.group=vg.skye

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.0.2-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,234 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle.kts

@@ -0,0 +1,49 @@
+import groovy.lang.MissingPropertyException
+
+pluginManagement {
+    repositories {
+        // Repositories
+        maven("https://maven.deftu.xyz/releases")
+        maven("https://maven.fabricmc.net")
+        maven("https://maven.architectury.dev/")
+        maven("https://maven.minecraftforge.net")
+        maven("https://repo.essential.gg/repository/maven-public")
+        maven("https://server.bbkr.space/artifactory/libs-release/")
+        maven("https://jitpack.io/")
+
+        // Snapshots
+        maven("https://maven.deftu.xyz/snapshots")
+        mavenLocal()
+
+        // Default repositories
+        gradlePluginPortal()
+        mavenCentral()
+    }
+
+    plugins {
+        val kotlin = "1.6.21"
+        kotlin("jvm") version(kotlin)
+        kotlin("plugin.serialization") version(kotlin)
+
+        val epgt = "1.10.3"
+        id("xyz.deftu.gradle.multiversion-root") version(epgt)
+    }
+}
+
+val projectName: String = extra["mod.name"]?.toString()
+    ?: throw MissingPropertyException("mod.name has not been set.")
+rootProject.name = projectName
+rootProject.buildFileName = "build.gradle.kts"
+
+listOf(
+    "1.18.2-fabric",
+    "1.19.4-fabric",
+    "1.18.2-forge",
+    "1.19.4-forge"
+).forEach { version ->
+    include(":$version")
+    project(":$version").apply {
+        projectDir = file("versions/$version")
+        buildFileName = "../../version.gradle.kts"
+    }
+}

src/main/java/vg/skye/e4mc_minecraft/mixins/ClientConnectionMixin.java

@@ -0,0 +1,25 @@
+package vg.skye.e4mc_minecraft.mixins;
+
+import io.netty.channel.Channel;
+import io.netty.channel.local.LocalAddress;
+import net.minecraft.network.ClientConnection;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+@Mixin(ClientConnection.class)
+public class ClientConnectionMixin {
+	@Shadow
+	private Channel channel;
+
+	@Inject(method = "isLocal", at = @At("RETURN"), cancellable = true)
+	private void isLocalInject(CallbackInfoReturnable<Boolean> cir) {
+		if (cir.getReturnValue()) {
+			 if (this.channel.localAddress().equals(new LocalAddress("e4mc-relay"))) {
+				 cir.setReturnValue(false);
+			 }
+		}
+	}
+}

src/main/java/vg/skye/e4mc_minecraft/mixins/ServerNetworkIoMixin.java

@@ -0,0 +1,64 @@
+package vg.skye.e4mc_minecraft.mixins;
+
+import io.netty.bootstrap.AbstractBootstrap;
+import io.netty.bootstrap.ServerBootstrap;
+import io.netty.channel.ServerChannel;
+import io.netty.channel.local.LocalAddress;
+import io.netty.channel.local.LocalServerChannel;
+import io.netty.channel.socket.ServerSocketChannel;
+import net.minecraft.server.ServerNetworkIo;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.Redirect;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+import vg.skye.e4mc_minecraft.E4mcRelayHandler;
+
+import javax.annotation.Nullable;
+import java.io.IOException;
+import java.net.InetAddress;
+
+@Mixin(ServerNetworkIo.class)
+public abstract class ServerNetworkIoMixin {
+	private static final ThreadLocal<Boolean> initializingE4mc = ThreadLocal.withInitial(() -> false);
+	private static E4mcRelayHandler e4mcHandler = null;
+
+	@Shadow
+	public abstract void bind(@Nullable InetAddress address, int port) throws IOException;
+
+	@Inject(method = "bind", at = @At("HEAD"))
+	private void bind(InetAddress address, int port, CallbackInfo ci) {
+		if (!initializingE4mc.get()) {
+			initializingE4mc.set(true);
+			try {
+				bind(address, port);
+			} catch (Exception e) {
+				e.printStackTrace();
+			} finally {
+				initializingE4mc.set(false);
+			}
+		} else {
+			E4mcRelayHandler handler = new E4mcRelayHandler();
+			e4mcHandler = handler;
+			handler.connect();
+		}
+	}
+
+	@Redirect(method = "bind", at = @At(value = "INVOKE", target = "Lio/netty/bootstrap/ServerBootstrap;channel(Ljava/lang/Class;)Lio/netty/bootstrap/AbstractBootstrap;", remap = false))
+	private AbstractBootstrap<ServerBootstrap, ServerChannel> redirectChannel(ServerBootstrap instance, Class<? extends ServerSocketChannel> aClass) {
+		return initializingE4mc.get() ? instance.channel(LocalServerChannel.class) : instance.channel(aClass);
+	}
+
+	@Redirect(method = "bind", at = @At(value = "INVOKE", target = "Lio/netty/bootstrap/ServerBootstrap;localAddress(Ljava/net/InetAddress;I)Lio/netty/bootstrap/AbstractBootstrap;", remap = false))
+	private AbstractBootstrap<ServerBootstrap, ServerChannel> redirectAddress(ServerBootstrap instance, InetAddress address, int port) {
+		return initializingE4mc.get() ? instance.localAddress(new LocalAddress("e4mc-relay")) : instance.localAddress(address, port);
+	}
+
+	@Inject(method = "stop", at = @At("HEAD"))
+	private void bind(CallbackInfo ci) {
+		e4mcHandler.close();
+	}
+
+
+}

src/main/kotlin/vg/skye/e4mc_minecraft/E4mcClient.kt

@@ -0,0 +1,28 @@
+package vg.skye.e4mc_minecraft
+
+//#if FABRIC==1
+import net.fabricmc.api.ModInitializer
+//#else
+//$$ import net.minecraftforge.fml.common.Mod
+//#endif
+import org.slf4j.Logger
+import org.slf4j.LoggerFactory
+
+//#if FORGE==1
+//$$ @Mod("e4mc_minecraft")
+//$$ object E4mcClient {
+//#else
+object E4mcClient : ModInitializer {
+//#endif
+    const val NAME = "e4mc"
+    const val ID = "e4mc_minecraft"
+    const val VERSION = "2.0.0"
+    @JvmField
+    val LOGGER: Logger = LoggerFactory.getLogger("e4mc")
+
+    //#if FABRIC==1
+    override fun onInitialize() {
+        // nothing needed
+    }
+    //#endif
+}

src/main/kotlin/vg/skye/e4mc_minecraft/E4mcRelayHandler.kt

@@ -0,0 +1,213 @@
+package vg.skye.e4mc_minecraft
+
+import com.google.gson.Gson
+import com.google.gson.JsonObject
+import io.netty.bootstrap.Bootstrap
+import io.netty.buffer.ByteBuf
+import io.netty.channel.*
+import io.netty.channel.local.LocalAddress
+import io.netty.channel.local.LocalChannel
+import io.netty.channel.nio.NioEventLoopGroup
+//#if FABRIC==1
+import net.fabricmc.api.EnvType
+import net.fabricmc.loader.api.FabricLoader
+//#else
+//$$ import net.minecraftforge.fml.loading.FMLLoader
+//#endif
+import net.minecraft.client.MinecraftClient
+import net.minecraft.text.ClickEvent
+import net.minecraft.text.Text
+//#if MC>=11900
+import net.minecraft.util.Formatting
+//#elseif FABRIC==1
+//$$ import net.minecraft.text.TranslatableText
+//$$ import net.minecraft.text.LiteralText
+//$$ import net.minecraft.util.Formatting
+//#else
+//$$ import net.minecraft.network.chat.TranslatableComponent
+//$$ import net.minecraft.network.chat.TextComponent
+//$$ import net.minecraft.ChatFormatting
+//#endif
+import org.java_websocket.client.WebSocketClient
+import org.java_websocket.handshake.ServerHandshake
+import java.lang.Exception
+import java.net.InetSocketAddress
+import java.net.URI
+import java.nio.ByteBuffer
+import java.util.concurrent.ArrayBlockingQueue
+
+
+data class DomainAssignedMessage(val DomainAssigned: String)
+data class ChannelOpenMessage(val ChannelOpen: List<Any>)
+data class ChannelClosedMessage(val ChannelClosed: Number)
+
+class E4mcRelayHandler: WebSocketClient(URI("wss://ingress.e4mc.link")) {
+    private val gson = Gson()
+    private val childChannels = mutableMapOf<Int, LocalChannel>()
+    private val messageQueue = mutableMapOf<Int, ArrayBlockingQueue<ByteBuffer>>()
+    private val eventLoopGroup = NioEventLoopGroup()
+
+    override fun onOpen(handshakedata: ServerHandshake?) {
+        // not much to do here
+    }
+
+    override fun onMessage(message: String?) {
+        E4mcClient.LOGGER.info("WebSocket Text message: {}", message)
+        val json = gson.fromJson(message, JsonObject::class.java)
+        when {
+            json.has("DomainAssigned") -> handleDomainAssigned(json)
+            json.has("ChannelOpen") -> handleChannelOpen(json)
+            json.has("ChannelClosed") -> handleChannelClosed(json)
+            else -> E4mcClient.LOGGER.warn("Unhandled WebSocket Text message: $message")
+        }
+    }
+
+    override fun onMessage(bytes: ByteBuffer) {
+        val channelId = bytes.get()
+        val rest = bytes.slice()
+        val channel = childChannels[channelId.toInt()]
+        if (channel == null) {
+            if (messageQueue[channelId.toInt()] == null) {
+                E4mcClient.LOGGER.info("Creating queue for channel: {}", channelId)
+                messageQueue[channelId.toInt()] = ArrayBlockingQueue(8)
+            }
+            messageQueue[channelId.toInt()]!!.add(rest)
+        } else {
+            val byteBuf = channel.alloc().buffer(rest.remaining())
+            byteBuf.writeBytes(rest)
+            channel.writeAndFlush(byteBuf).sync()
+        }
+    }
+
+    override fun onClose(code: Int, reason: String?, remote: Boolean) {
+        childChannels.forEach { (_, channel) -> channel.close() }
+    }
+
+    override fun onError(ex: java.lang.Exception) {
+        ex.printStackTrace()
+    }
+
+    private fun handleDomainAssigned(json: JsonObject) {
+        val msg = gson.fromJson(json, DomainAssignedMessage::class.java)
+
+        //#if FABRIC==1
+        val isClient = FabricLoader.getInstance().environmentType.equals(EnvType.CLIENT)
+        val isServer = FabricLoader.getInstance().environmentType.equals(EnvType.SERVER)
+        //#else
+        //$$ val isClient = FMLLoader.getDist().isClient
+        //$$ val isServer = FMLLoader.getDist().isDedicatedServer
+        //#endif
+
+        if (isServer) {
+            E4mcClient.LOGGER.warn("e4mc running on Dedicated Server; This works, but isn't recommended as e4mc is designed for short-lived LAN servers")
+        }
+        E4mcClient.LOGGER.info("Domain assigned: ${msg.DomainAssigned}")
+
+        if (isClient) {
+            alertUser(msg.DomainAssigned)
+        }
+    }
+
+    private fun alertUser(domain: String) {
+        try {
+            MinecraftClient.getInstance().inGameHud.chatHud.addMessage(
+                createMessage(domain)
+            )
+        } catch (e: Exception) {
+            e.printStackTrace()
+        }
+    }
+
+    private fun createMessage(domain: String): Text {
+        //#if MC>=11900
+        return Text.translatable(
+            "text.e4mc_quilt.domainAssigned",
+            Text.literal(domain).styled {
+                it
+                    .withClickEvent(ClickEvent(ClickEvent.Action.COPY_TO_CLIPBOARD, domain))
+                    .withColor(Formatting.GREEN)
+            }
+        )
+        //#elseif FABRIC==1
+        //$$ return TranslatableText("text.e4mc_quilt.domainAssigned", LiteralText(domain).styled {
+        //$$     return@styled it
+        //$$         .withClickEvent(ClickEvent(ClickEvent.Action.COPY_TO_CLIPBOARD, domain))
+        //$$         .withColor(Formatting.GREEN)
+        //$$ })
+        //#else
+        //$$ return TranslatableComponent("text.e4mc_quilt.domainAssigned", TextComponent(domain).withStyle {
+        //$$     return@withStyle it
+        //$$         .withClickEvent(ClickEvent(ClickEvent.Action.COPY_TO_CLIPBOARD, domain))
+        //$$         .withColor(ChatFormatting.GREEN)
+        //$$ })
+        //#endif
+    }
+
+    private fun handleChannelOpen(json: JsonObject) {
+        val msg = gson.fromJson(json, ChannelOpenMessage::class.java)
+        val channelId = msg.ChannelOpen[0] as Number
+        val clientInfo = msg.ChannelOpen[1] as String
+        E4mcClient.LOGGER.info("Channel opened: channelId=$channelId, clientInfo=$clientInfo")
+        val host = clientInfo.substringBeforeLast(':')
+        val port = clientInfo.substringAfterLast(':').toInt()
+        val addr = InetSocketAddress(host, port)
+
+        val self = this
+
+        Bootstrap()
+            .channel(LocalChannel::class.java)
+            .handler(object : ChannelInitializer<LocalChannel>() {
+                @Throws(java.lang.Exception::class)
+                override fun initChannel(ch: LocalChannel) {
+                    ch.pipeline().addLast(ChildHandler(self, addr, channelId.toInt()))
+                }
+            })
+            .group(eventLoopGroup)
+            .connect(LocalAddress("e4mc-relay"))
+    }
+
+    private fun handleChannelClosed(json: JsonObject) {
+        val msg = gson.fromJson(json, ChannelClosedMessage::class.java)
+        val channelId = msg.ChannelClosed.toInt()
+        E4mcClient.LOGGER.info("Closing channel as requested: {}", channelId)
+        childChannels.remove(channelId)?.let {
+            it.pipeline().get(ChildHandler::class.java).isClosedFromServer = true
+            it.close()
+            E4mcClient.LOGGER.info("Channel closed: channelId=$channelId")
+        }
+    }
+
+    class ChildHandler(private val parent: E4mcRelayHandler, private val address: InetSocketAddress, private val channelId: Int): SimpleChannelInboundHandler<ByteBuf>() {
+        var isClosedFromServer = false
+        override fun channelActive(ctx: ChannelHandlerContext) {
+//            ctx.writeAndFlush(address)
+            if (parent.messageQueue[channelId] != null) {
+                parent.messageQueue[channelId]!!.forEach { buf ->
+                    run {
+                        E4mcClient.LOGGER.info("Handling queued buffer: {}", buf)
+                        val byteBuf = ctx.alloc().buffer(buf.remaining())
+                        byteBuf.writeBytes(buf)
+                        ctx.writeAndFlush(byteBuf)
+                    }
+                }
+                parent.messageQueue.remove(channelId)
+            }
+            parent.childChannels[channelId] = ctx.channel() as LocalChannel
+        }
+
+        override fun channelRead0(ctx: ChannelHandlerContext, msg: ByteBuf) {
+            val buf = ByteArray(msg.readableBytes() + 1)
+            buf[0] = channelId.toByte()
+            msg.readBytes(buf, 1, msg.readableBytes())
+            parent.send(buf)
+        }
+
+        override fun channelInactive(ctx: ChannelHandlerContext) {
+            E4mcClient.LOGGER.info("Channel closed: {}", channelId)
+            if (!isClosedFromServer) {
+                parent.send(parent.gson.toJson(ChannelClosedMessage(channelId)))
+            }
+            parent.childChannels.remove(channelId)
+        }
+    }
+}

src/main/resources/META-INF/mods.toml

@@ -0,0 +1,25 @@
+modLoader="kotlinforforge"
+loaderVersion="*"
+license='MIT'
+
+[[mods]]
+modId="${mod_id}"
+version="${mod_version}"
+displayName="${mod_name}"
+credits="skyevg"
+authors="skyevg"
+description='''
+Open a LAN server to anyone, anywhere, anytime.
+'''
+[[dependencies.${mod_id}]]
+modId="forge"
+mandatory=true
+versionRange="*"
+ordering="NONE"
+side="BOTH"
+[[dependencies.${mod_id}]]
+modId="minecraft"
+mandatory=true
+versionRange="${mc_version == "1.19.4" ? "[1.19,)" : "[1.17,1.19)"}"
+ordering="NONE"
+side="BOTH"

src/main/resources/assets/e4mc_quilt/lang/en_us.json

@@ -0,0 +1,3 @@
+{
+  "text.e4mc_quilt.domainAssigned": "Local game hosted on domain [%s]"
+}

src/main/resources/e4mc_minecraft.mixins.json

@@ -0,0 +1,14 @@
+{
+    "required": true,
+    "package": "vg.skye.e4mc_minecraft.mixins",
+    "compatibilityLevel": "JAVA_16",
+    "injectors": {
+        "defaultRequire": 1
+    },
+    "mixins": [
+        "ServerNetworkIoMixin",
+        "ClientConnectionMixin"
+    ],
+    "client": [],
+    "server": []
+}

src/main/resources/fabric.mod.json

@@ -0,0 +1,36 @@
+{
+    "schemaVersion": 1,
+    "id": "${mod_id}",
+    "version": "${mod_version}",
+    "name": "${mod_name}",
+    "description": "Open a LAN server to anyone, anywhere, anytime.",
+    "authors": [
+        "skyevg"
+    ],
+    "contributors": [],
+    "contact": {
+        "homepage": "https://e4mc.link",
+        "issues": "https://git.skye.vg/me/e4mc_minecraft/issues",
+        "sources": "https://git.skye.vg/me/e4mc_minecraft"
+    },
+    "license": "MIT",
+    "environment": "*",
+    "entrypoints": {
+        "main": [
+            {
+                "adapter": "kotlin",
+                "value": "vg.skye.e4mc_minecraft.E4mcClient"
+            }
+        ]
+    },
+    "mixins": [
+        "${mod_id}.mixins.json"
+    ],
+    "depends": {
+        "fabric": "*",
+        "fabricloader": ">=0.14.9",
+        "fabric-language-kotlin": "*",
+        "minecraft": "${mc_version == "1.19.4" ? ">=1.19" : ">=1.17 <1.19"}",
+        "java": ">=16"
+    }
+}

src/main/resources/pack.mcmeta

@@ -0,0 +1,6 @@
+{
+  "pack": {
+    "description": "e4mc resources",
+    "pack_format": 7
+  }
+}

version.gradle.kts

@@ -0,0 +1,74 @@
+import com.modrinth.minotaur.dependencies.DependencyType
+import com.modrinth.minotaur.dependencies.ModDependency
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+plugins {
+    java
+    kotlin("jvm")
+    id("xyz.deftu.gradle.multiversion")
+    id("xyz.deftu.gradle.tools")
+    id("xyz.deftu.gradle.tools.minecraft.loom")
+    id("xyz.deftu.gradle.tools.shadow")
+    id("xyz.deftu.gradle.tools.minecraft.releases")
+}
+
+val bundle by configurations.creating {
+    if (mcData.isFabric) {
+        configurations.getByName("include").extendsFrom(this)
+    } else configurations.getByName("shade").extendsFrom(this)
+}
+
+loomHelper {
+    if (mcData.isForge) {
+        useForgeMixin("e4mc_minecraft.mixins.json", true)
+    }
+}
+
+releases {
+    modrinth {
+        projectId.set("qANg5Jrr")
+        if (mcData.isFabric) {
+            dependencies.set(
+                listOf(
+                    ModDependency("P7dR8mSH", DependencyType.REQUIRED),
+                    ModDependency("Ha28R6CL", DependencyType.REQUIRED),
+                )
+            )
+        } else {
+            dependencies.set(
+                listOf(
+                    ModDependency("ordsPcFz", DependencyType.REQUIRED),
+                )
+            )
+        }
+    }
+}
+
+repositories {
+    maven("https://maven.terraformersmc.com/")
+    mavenCentral()
+    maven("https://thedarkcolour.github.io/KotlinForForge/")
+}
+
+dependencies {
+    implementation(kotlin("stdlib"))
+
+    if (mcData.isFabric) {
+        modImplementation(
+            "net.fabricmc.fabric-api:fabric-api:${
+                when (mcData.version) {
+                    11904 -> "0.78.0+1.19.4"
+                    11802 -> "0.76.0+1.18.2"
+                    else -> throw IllegalStateException("Invalid MC version: ${mcData.version}")
+                }
+            }"
+        )
+
+        modImplementation("net.fabricmc:fabric-language-kotlin:1.8.6+kotlin.1.7.21")
+    } else if (mcData.isForge) {
+        implementation("thedarkcolour:kotlinforforge:3.8.0")
+    }
+    bundle(implementation("org.java-websocket:Java-WebSocket:1.5.3") {
+        exclude(group = "org.slf4j")
+    })
+}

versions/mainProject

@@ -0,0 +1 @@
+1.19.4-fabric